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Radio-Exercise_No.1

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<!DOCTYPE html>
<html lang="ja">

<head>
  <meta charset="UTF-8">
  <title>ラジオ体操動画プレイヤー</title>
  <link rel="preconnect" href="https://fonts.googleapis.com">
  <link rel="preconnect" href="https://fonts.gstatic.com" crossorigin>
  <link href="https://fonts.googleapis.com/css2?family=M+PLUS+Rounded+1c&display=swap" rel="stylesheet">
  <link rel="icon" href="icon.png" type="image/png">
  <style>
    body {
      display: flex;
      flex-direction: column;
      align-items: center;
      background-color: #0a0a12;
      color: #00ffcc;
      font-family: "M PLUS Rounded 1c", monospace;
      padding: 20px;
      margin: 0;
      overflow-x: hidden; /* 横スクロール禁止 */
    }

    h1 {
      color: #00aaff;
      text-shadow: 0 0 5px #0066ff;
      border-bottom: 1px solid #0066ff;
      padding-bottom: 10px;
      text-align: center;
    }

    .video-container {
      position: relative;
      max-width: 800px;
      margin-bottom: 20px;
      margin-top: 30px;
      border: 2px solid #0066ff;
      box-shadow: 0 0 15px rgba(0, 102, 255, 0.5);
      background: #000;
    }

    video {
      width: 100%;
      display: block;
    }

    /* 字幕スタイル */
    video::cue {
      background-color: rgba(0, 0, 0, 0.7) !important;
      color: #c7dbed !important;
      font-family: "M PLUS Rounded 1c", monospace !important;
      text-shadow: 1px 1px 2px #000 !important;
      outline: 3px solid #0b3e8f !important;
      border-radius: 10px !important; /* 角を丸める */
    }

    /* カスタム動画コントロール */
    video::-webkit-media-controls {
      display: none !important;
    }

    .custom-controls {
      position: absolute;
      bottom: 0;
      left: 0;
      right: 0;
      /*background: linear-gradient(to top, rgba(0, 20, 40, 0.9), transparent);*/
      padding: 10px;
      display: flex;
      flex-direction: column;
      opacity: 0;
      transition: opacity 0.3s;
    }

    .video-container:hover .custom-controls {
      opacity: 1;
    }

    .progress-container {
      width: 100%;
      height: 8px;
      background: #001133;
      margin-bottom: 10px;
      cursor: pointer;
      position: relative;
    }

    .progress-bar {
      height: 100%;
      background: #00aaff;
      width: 0%;
      position: relative;
    }

    .progress-bar::after {
      content: '';
      position: absolute;
      right: -5px;
      top: 50%;
      transform: translateY(-50%);
      width: 10px;
      height: 10px;
      background: #00ccff;
      border-radius: 50%;
      box-shadow: 0 0 5px #00ccff;
    }

    /* ホバー時の時間表示 */
    .hover-time {
      position: absolute;
      top: -30px;
      transform: translateX(-50%);
      background: rgba(0, 20, 40, 0.8);
      color: #00ccff;
      padding: 3px 6px;
      border-radius: 4px;
      font-size: 12px;
      pointer-events: none;
      display: none;
    }

    .buttons-container {
      display: flex;
      align-items: center;
      justify-content: space-between;
    }

    .left-controls, .right-controls {
      display: flex;
      align-items: center;
      gap: 15px;
    }

    .control-btn {
      background: none;
      border: none;
      color: #00ccff;
      font-size: 16px;
      cursor: pointer;
      transition: all 0.3s;
    }

    .control-btn:hover {
      color: #00ffcc;
      text-shadow: 0 0 5px #00ffcc;
    }

    .time-display {
      font-size: 14px;
      color: #00aaff;
      box-shadow: 0.1px 0.1px 0.1px black;
      font-family: "M PLUS Rounded 1c", monospace;
    }

    .volume-container {
      display: flex;
      align-items: center;
      gap: 5px;
    }

    .volume-slider {
      width: 80px;
      -webkit-appearance: none;
      height: 4px;
      background: #001133;
      outline: none;
    }

    .volume-slider::-webkit-slider-thumb {
      -webkit-appearance: none;
      width: 12px;
      height: 12px;
      background: #00aaff;
      border-radius: 50%;
      cursor: pointer;
    }

    .controls {
      display: flex;
      flex-direction: column;
      gap: 15px;
      width: 100%;
      max-width: 800px;
      background-color: #0f0f1a;
      padding: 20px;
      border: 1px solid #0066ff;
      box-shadow: 0 0 15px rgba(0, 102, 255, 0.3);
    }

    .control-group {
      display: flex;
      flex-direction: row;
      align-items: center;
      justify-content: flex-start;
      gap: 10px;
      flex-wrap: nowrap;
    }

    .control-group label {
      white-space: nowrap;
      min-width: 100px;
      text-align: right;
      color: #00ccff;
    }

    input[type="range"] {
      flex-grow: 1;
      -webkit-appearance: none;
      height: 8px;
      background: #001133;
      border-radius: 5px;
      outline: none;
    }

    input[type="range"]::-webkit-slider-thumb {
      -webkit-appearance: none;
      width: 18px;
      height: 18px;
      background: #00aaff;
      border-radius: 50%;
      cursor: pointer;
      box-shadow: 0 0 5px #00aaff;
    }

    input[type="number"], select {
      background-color: #001133;
      color: #00ccff;
      border: 1px solid #0066ff;
      padding: 5px;
      font-family: "M PLUS Rounded 1c", monospace;
    }

    button {
      background-color: #001133;
      color: #00ccff;
      border: 1px solid #0066ff;
      padding: 8px 15px;
      cursor: pointer;
      font-family: "M PLUS Rounded 1c", monospace;
      transition: all 0.3s;
      align-self: flex-start;
    }

    button:hover {
      background-color: #0066ff;
      color: #000;
      box-shadow: 0 0 10px #0066ff;
    }

    select {
      width: 300px;
      background-color: #001133;
      color: #00ccff;
      border: 1px solid #0066ff;
      padding: 5px;
    }

    input[type="checkbox"] {
      -webkit-appearance: none;
      width: 18px;
      height: 18px;
      background: #001133;
      border: 1px solid #0066ff;
      position: relative;
    }

    input[type="checkbox"]:checked {
      background: #0066ff;
      box-shadow: 0 0 5px #0066ff;
    }

    input[type="checkbox"]:checked::after {
      content: "✓";
      position: absolute;
      color: #000;
      font-size: 14px;
      top: 50%;
      left: 50%;
      transform: translate(-50%, -50%);
    }

    /* 字幕設定用スタイル */
    .subtitle-settings {
      margin-top: 10px;
      padding: 10px;
      background-color: rgba(0, 20, 40, 0.5);
      border: 1px solid #0066ff;
    }

    /* 字幕サイズ調整用のCSS変数 */
    :root {
      --subtitle-scale: 1;
      --subtitle-border-radius: 10px;
    }

    video::cue {
      font-size: calc(16px * var(--subtitle-scale)) !important;
      line-height: 1.5 !important;
      border-radius: var(--subtitle-border-radius) !important;
    }

    /* 全画面時の字幕サイズ調整 */
    .video-container:fullscreen video::cue,
    .video-container:-webkit-full-screen video::cue,
    .video-container:-moz-full-screen video::cue,
    .video-container:-ms-fullscreen video::cue {
      font-size: calc(16px * var(--subtitle-scale) * var(--fullscreen-scale, 1)) !important;
    }
    body {
      margin: 0;
            padding: 0;
            background-color: #0a192f; /* 暗い青 */
            height: 100vh;
            width: 100vw;
        }

        .ripple {
            position: absolute;
            border-radius: 50%;
            background: transparent;
            border: 1px solid rgba(100, 210, 255, 0.3); /* 半透明の薄い水色 */
            transform: translate(-50%, -50%);
            pointer-events: none;
            animation: ripple-animation 4s ease-out forwards;
            z-index: -1;
            position: absolute; /* または fixed / relative、必要に応じて調整 */          
        }

        @keyframes ripple-animation {
            0% {
                width: 0;
                height: 0;
                opacity: 0.6;
            }
            100% {
                width: 600px;
                height: 600px;
                opacity: 0;
            }
        }

    /* ローディングアニメーション */
    .loading-overlay {
      position: fixed;
      top: 0;
      left: 0;
      width: 100%;
      height: 100%;
      background-color: rgba(0, 0, 0, 0.8);
      display: flex;
      justify-content: center;
      align-items: center;
      z-index: 9999;
      transition: opacity 1s ease-out;
    }

    .spinner-box {
      width: 300px;
      height: 300px;
      display: flex;
      justify-content: center;
      align-items: center;
      background-color: transparent;
    }

    /* 軌道スタイル */
    .leo {
      position: absolute;
      display: flex;
      justify-content: center;
      align-items: center;
      border-radius: 50%;
    }

    .blue-orbit {
      width: 165px;
      height: 165px;
      border: 1px solid #91daffa5;
      animation: spin3D 3s linear .2s infinite;
    }

    .green-orbit {
      width: 120px;
      height: 120px;
      border: 1px solid #91ffbfa5;
      animation: spin3D 2s linear 0s infinite;
    }

    .red-orbit {
      width: 90px;
      height: 90px;
      border: 1px solid #ffca91a5;
      animation: spin3D 1s linear 0s infinite;
    }

    .white-orbit {
      width: 60px;
      height: 60px;
      border: 2px solid #ffffff;
      animation: spin3D 10s linear 0s infinite;
    }

    .w1 {
      transform: rotate3D(1, 1, 1, 90deg);
    }

    .w2 {
      transform: rotate3D(1, 2, .5, 90deg);
    }

    .w3 {
      transform: rotate3D(.5, 1, 2, 90deg);
    }

    /* キーフレームアニメーション */
    @keyframes spin3D {
      from {
        transform: rotate3d(.5,.5,.5, 360deg);
      }
      to {
        transform: rotate3d(0,0,0, 0deg);
      }
    }

    @keyframes spin {
      from {
        transform: rotate(0deg);
      }
      to {
        transform: rotate(360deg);
      }
    }

    /* 動画非表示モード用スタイル */
    .audio-only-mode video {
      display: none;
    }
    .audio-only-mode .video-container {
      background: transparent;
      border: none;
      box-shadow: none;
    }
    .audio-only-mode .controls {
      margin-top: 0;
    }
  </style>
</head>

<body>
  <!-- ローディングオーバーレイ -->
  <div class="loading-overlay" id="loadingOverlay">
    <div class="spinner-box">
      <div class="blue-orbit leo"></div>
      <div class="green-orbit leo"></div>
      <div class="red-orbit leo"></div>
      <div class="white-orbit w1 leo"></div>
      <div class="white-orbit w2 leo"></div>
      <div class="white-orbit w3 leo"></div>
    </div>
  </div>

  <div id="ripple-container">
  </div>
  <script>
    // ローディングアニメーションをフェードアウト
    window.addEventListener('load', function() {
      setTimeout(function() {
        const loadingOverlay = document.getElementById('loadingOverlay');
        loadingOverlay.style.opacity = '0';
        setTimeout(function() {
          loadingOverlay.style.display = 'none';
        }, 1000); // フェードアウト完了後に非表示にする
      }, 1500); // ページ読み込み後1.5秒でフェードアウト開始
    });

    document.addEventListener('DOMContentLoaded', function() {
      const container = document.getElementById('ripple-container');
      
      function createRipple() {
          const ripple = document.createElement('div');
          ripple.classList.add('ripple');
          
          // ランダムな位置
          const posX = Math.random() * 100;
          const posY = Math.random() * 100;
          
          // ランダムなサイズとアニメーション時間
          const maxSize = 400 + Math.random() * 500;
          const duration = 3 + Math.random() * 3;
          
          // 半透明の薄い水色のバリエーション
          const hue = 190 + Math.random() * 20 - 10; // 水色を中心に少し変化
          const saturation = 80 + Math.random() * 15;
          const lightness = 70 + Math.random() * 20;
          const opacity = 0.3 + Math.random() * 0.3;
          
          ripple.style.left = `${posX}%`;
          ripple.style.top = `${posY}%`;
          ripple.style.borderColor = `hsla(${hue}, ${saturation}%, ${lightness}%, ${opacity})`;
          ripple.style.animationDuration = `${duration}s`;
          
          // キーフレームを動的に変更
          //Math.random()で 0〜1 のランダムな数を生成。 .toString(36) で36進数（0-9 + a-z）に変換。
          //.substr(2, 9) で先頭の "0." を除いた部分から9文字取り出し、 結果として英数字のランダムな9文字列を生成。
          const animationName = `ripple-${Date.now()}-${Math.random().toString(36).substr(2, 9)}`;
          ripple.style.animationName = animationName;
          
          const style = document.createElement('style');
          style.innerHTML = `
              @keyframes ${animationName} {
                  0% {
                      width: 0;
                      height: 0;
                      opacity: ${opacity};
                  }
                  100% {
                      width: ${maxSize}px;
                      height: ${maxSize}px;
                      opacity: 0;
                  }
              }
          `;
          document.head.appendChild(style);
          
          container.appendChild(ripple);
          
          // アニメーション終了後に要素を削除
          ripple.addEventListener('animationend', function() {
              ripple.remove();
              style.remove();
          });
      }
      
      // 最初の波紋をいくつか作成
      for (let i = 0; i < 8; i++) {
          setTimeout(createRipple, i * 600);
      }
      
      // 定期的に新しい波紋を作成
      setInterval(createRipple, 1200);
      
      // クリックでも波紋を作成
      document.addEventListener('click', function(e) {
          createRippleAtPosition(e.clientX, e.clientY);
      });
      
      function createRippleAtPosition(x, y) {
          const ripple = document.createElement('div');
          ripple.classList.add('ripple');
          
          const maxSize = 400 + Math.random() * 500;
          const duration = 3 + Math.random() * 3;
          const hue = 190 + Math.random() * 20 - 10;
          const saturation = 80 + Math.random() * 15;
          const lightness = 70 + Math.random() * 20;
          const opacity = 0.3 + Math.random() * 0.3;
          
          ripple.style.left = `${x}px`;
          ripple.style.top = `${y}px`;
          ripple.style.borderColor = `hsla(${hue}, ${saturation}%, ${lightness}%, ${opacity})`;
          ripple.style.animationDuration = `${duration}s`;
          
          const animationName = `ripple-click-${Date.now()}-${Math.random().toString(36).substr(2, 9)}`;
          ripple.style.animationName = animationName;
          
          const style = document.createElement('style');
          style.innerHTML = `
              @keyframes ${animationName} {
                  0% {
                      width: 0;
                      height: 0;
                      opacity: ${opacity};
                  }
                  100% {
                      width: ${maxSize}px;
                      height: ${maxSize}px;
                      opacity: 0;
                  }
              }
          `;
          document.head.appendChild(style);
          
          container.appendChild(ripple);
          
          ripple.addEventListener('animationend', function() {
              ripple.remove();
              style.remove();
          });
      }
  });
  </script>
  <h1>ラジオ体操動画プレイヤー
    <br>For Kushihara</h1>
  <div class="controls">
    <div class="control-group">
      <label for="videoSelect">動画の音量：</label>
      <select id="videoSelect">
        <option value="v.mp4">小</option>
        <option value="v-2.mp4">大(+50dB)</option>
      </select>
    </div>
    <div class="control-group">
      <label for="speedRange">再生速度：</label>
      <input type="range" id="speedRange" min="0.0001" max="10" step="0.0001" value="1" style="width:700px !important;">
      <input type="number" id="speedInput" min="0.0001" step="0.0001" value="1">
    </div>
    <div class="control-group">
      <label for="volumeRange">音量：</label>
      <input type="range" id="volumeRange" min="0" max="1" step="0.01" value="1">
      <input type="number" id="volumeInput" min="0" max="1" step="0.01" value="1">
    </div>
    <div class="control-group">
      <label for="loopCheckbox">ループ再生：</label>
      <input type="checkbox" id="loopCheckbox" checked>
    </div>
    <div class="control-group">
      <label for="audioOnlyCheckbox">音声のみモード：</label>
      <input type="checkbox" id="audioOnlyCheckbox">
    </div>
    <!-- 字幕設定セクション -->
    <div class="subtitle-settings">
      <div class="control-group">
        <label for="subtitleToggle">字幕表示：</label>
        <input type="checkbox" id="subtitleToggle" checked>
      </div>
      <div class="control-group">
        <label for="subtitleSize">文字サイズ：</label>
        <input type="range" id="subtitleSize" min="0.5" max="5" step="0.1" value="1.5">
        <input type="number" id="subtitleSizeInput" min="0.01" step="0.01" value="1.5">
      </div>
      <div class="control-group">
        <label for="subtitleTrack">字幕トラック：</label>
        <select id="subtitleTrack">
          <option value="v.vtt">日本語</option>
          <option value="">字幕なし</option>
        </select>
      </div>
    </div>
    <button onclick="goFullscreen()">全画面</button>
  </div>
  <div class="video-container">
    <video id="videoPlayer" src="v.mp4">
      <track id="subtitleTrackElement" kind="subtitles" src="v.vtt" srclang="ja" label="日本語" default>
      </track>
    </video>
    <div class="custom-controls">
      <div class="progress-container" id="progressContainer">
        <div class="progress-bar" id="progressBar">
        </div>
        <div class="hover-time" id="hoverTime"></div>
      </div>
      <div class="buttons-container">
        <div class="left-controls">
          <button class="control-btn" id="playPauseBtn">▶</button>
          <span class="time-display" id="timeDisplay">00:00 / 00:00</span>
        </div>
        <div class="right-controls">
          <div class="volume-container">
            <button class="control-btn" id="volumeBtn">🔊</button>
            <input type="range" class="volume-slider" id="volumeSlider" min="0" max="1" step="0.01" value="1">
          </div>
          <button class="control-btn" id="subtitleBtn" title="字幕">🔤</button>
          <button class="control-btn" id="audioOnlyBtn" title="音声のみ">🎵</button>
          <button class="control-btn" id="fullscreenBtn">⛶</button>
        </div>
      </div>
    </div>
  </div>
  <script>
    const video = document.getElementById('videoPlayer');
    const videoSelect = document.getElementById('videoSelect');
    const speedRange = document.getElementById('speedRange');
    const speedInput = document.getElementById('speedInput');
    const volumeRange = document.getElementById('volumeRange');
    const volumeInput = document.getElementById('volumeInput');
    const loopCheckbox = document.getElementById('loopCheckbox');
    const audioOnlyCheckbox = document.getElementById('audioOnlyCheckbox');
    const playPauseBtn = document.getElementById('playPauseBtn');
    const progressBar = document.getElementById('progressBar');
    const progressContainer = document.getElementById('progressContainer');
    const hoverTime = document.getElementById('hoverTime');
    const timeDisplay = document.getElementById('timeDisplay');
    const volumeBtn = document.getElementById('volumeBtn');
    const volumeSlider = document.getElementById('volumeSlider');
    const fullscreenBtn = document.getElementById('fullscreenBtn');
    const subtitleBtn = document.getElementById('subtitleBtn');
    const audioOnlyBtn = document.getElementById('audioOnlyBtn');
    const subtitleToggle = document.getElementById('subtitleToggle');
    const subtitleSize = document.getElementById('subtitleSize');
    const subtitleSizeInput = document.getElementById('subtitleSizeInput');
    const subtitleTrack = document.getElementById('subtitleTrack');
    const subtitleTrackElement = document.getElementById('subtitleTrackElement');
    const videoContainer = document.querySelector('.video-container');
    const controls = document.querySelector('.controls');
  
    // 初期設定
    video.controls = false;
    let isDragging = false;
    let subtitlesEnabled = true;
    let normalVideoWidth = videoContainer.clientWidth;
    let audioOnlyMode = false;
  
const previewVideo = document.getElementById("previewVideo");
previewVideo.src = video.src;
previewVideo.preload = "auto";

progressContainer.addEventListener("mousemove", (e) => {
  if (!video.duration) return;

  const rect = progressContainer.getBoundingClientRect();
  const hoverTimeSec = (e.clientX - rect.left) / rect.width * video.duration;

  // プレビュー用video設定
  previewVideo.currentTime = hoverTimeSec;
  previewVideo.style.display = "block";
  previewVideo.style.left = `${e.clientX - 80}px`; // 中央揃え調整
  previewVideo.style.top = `${rect.top - 100}px`; // 上に配置（必要に応じて調整）
});
      
      progressContainer.addEventListener('mouseleave', () => {
        hoverTime.style.display = 'none';
      });

  
    function updatePlaybackRate(value) {
      const speed = parseFloat(value);
      speedInput.value = speed;
      speedRange.value = speed;
      video.playbackRate = speed;
    }
  
    function updateVolume(value) {
      const volume = parseFloat(value);
      volumeInput.value = volume;
      volumeRange.value = volume;
      volumeSlider.value = volume;
      video.volume = volume;
      
      if (volume === 0) {
        volumeBtn.textContent = '🔇';
      } else if (volume < 0.5) {
        volumeBtn.textContent = '🔈';
      } else {
        volumeBtn.textContent = '🔊';
      }
    }
  
    function handleVideoChange() {
      const selected = videoSelect.value;
  
      if (selected === 'v-2.mp4') {
        const confirmPlay = confirm("この動画は音量が大きいです。あらかじめ、デバイスの音量をある程度下げてください。また、音割れが起きます。再生してもよろしいですか？");
        if (!confirmPlay) {
          videoSelect.value = video.src.split('/').pop();
          return;
        }
      }
  
      video.src = selected;
      video.load();
      video.play().then(() => {
        playPauseBtn.textContent = '⏸';
      }).catch(e => console.log(e));
    }
  
    function togglePlayPause() {
      if (video.paused) {
        video.play();
        playPauseBtn.textContent = '⏸';
      } else {
        video.pause();
        playPauseBtn.textContent = '▶';
      }
    }
  
    function updateProgress() {
      const percent = (video.currentTime / video.duration) * 100;
      progressBar.style.width = `${percent}%`;
      
      const currentMinutes = Math.floor(video.currentTime / 60);
      const currentSeconds = Math.floor(video.currentTime % 60).toString().padStart(2, '0');
      const durationMinutes = Math.floor(video.duration / 60);
      const durationSeconds = Math.floor(video.duration % 60).toString().padStart(2, '0');
      
      timeDisplay.textContent = `${currentMinutes}:${currentSeconds} / ${durationMinutes}:${durationSeconds}`;
    }
  
    function setProgress(e) {
      const width = progressContainer.clientWidth;
      const clickX = e.offsetX;
      const duration = video.duration;
      video.currentTime = (clickX / width) * duration;
    }
  
    function toggleMute() {
      video.muted = !video.muted;
      if (video.muted) {
        volumeBtn.textContent = '🔇';
        volumeSlider.value = 0;
      } else {
        updateVolume(video.volume);
      }
    }
  
    function handleVolumeChange() {
      video.muted = false;
      updateVolume(volumeSlider.value);
    }
  
    function goFullscreen() {
      if (
        document.fullscreenElement || 
        document.webkitFullscreenElement || 
        document.msFullscreenElement
      ) {
        // フルスクリーンを解除
        if (document.exitFullscreen) {
          document.exitFullscreen();
        } else if (document.webkitExitFullscreen) {
          document.webkitExitFullscreen();
        } else if (document.msExitFullscreen) {
          document.msExitFullscreen();
        }
      } else {
        // フルスクリーンにする
        if (videoContainer.requestFullscreen) {
          videoContainer.requestFullscreen();
        } else if (videoContainer.webkitRequestFullscreen) {
          videoContainer.webkitRequestFullscreen();
        } else if (videoContainer.msRequestFullscreen) {
          videoContainer.msRequestFullscreen();
        }
      }
    }
    
    // 全画面時の右クリックメニュー
    function setupFullscreenContextMenu() {
      videoContainer.addEventListener('contextmenu', (e) => {
        e.preventDefault();
        
        // 全画面モードかどうかをチェック
        const isFullscreen = document.fullscreenElement || 
                           document.webkitFullscreenElement || 
                           document.msFullscreenElement;
        
        if (isFullscreen) {
          // コントロールパネルを表示
          controls.style.display = controls.style.display === 'none' ? 'flex' : 'none';
        }
      });
    }
  
    // 動画非表示モード
    function toggleAudioOnlyMode() {
      audioOnlyMode = !audioOnlyMode;
      audioOnlyCheckbox.checked = audioOnlyMode;
      
      if (audioOnlyMode) {
        videoContainer.classList.add('audio-only-mode');
        audioOnlyBtn.textContent = '🎬'; // 動画表示アイコンに変更
      } else {
        videoContainer.classList.remove('audio-only-mode');
        audioOnlyBtn.textContent = '🎵'; // 音声のみアイコンに戻す
      }
    }
  
    // 全画面変更時の字幕サイズ調整
    function updateSubtitleScaleForFullscreen() {
      if (document.fullscreenElement || document.webkitFullscreenElement || 
          document.mozFullScreenElement || document.msFullscreenElement) {
        // 全画面モード
        const fullscreenWidth = window.innerWidth;
        const scaleFactor = fullscreenWidth / normalVideoWidth;
        document.documentElement.style.setProperty('--fullscreen-scale', scaleFactor);
      } else {
        // 通常モード
        document.documentElement.style.setProperty('--fullscreen-scale', 1);
      }
    }
  
    // 字幕関連の関数
    function toggleSubtitles() {
      subtitlesEnabled = subtitleToggle.checked;
      subtitleTrackElement.track.mode = subtitlesEnabled ? 'showing' : 'hidden';
      subtitleBtn.style.color = subtitlesEnabled ? '#00ccff' : '#666';
    }
  
    function updateSubtitleSize(value) {
      const size = parseFloat(value);
      subtitleSizeInput.value = size;
      subtitleSize.value = size;
      
      // 字幕サイズを制御
      document.documentElement.style.setProperty('--subtitle-scale', size);
      
      // VTTCueのlineプロパティには数値のみを設定（'bottom'は無効）
      const track = subtitleTrackElement.track;
      if (track && track.cues) {
        for (let i = 0; i < track.cues.length; i++) {
          // 画面下部に表示するため、適切な数値を設定。とりあえず90。
          track.cues[i].line = 90;
          track.cues[i].snapToLines = false; // ラインスナップを無効に
        }
      }
    }
    
    function changeSubtitleTrack() {
      const selectedTrack = subtitleTrack.value;
      subtitleTrackElement.src = selectedTrack;
      subtitleTrackElement.track.mode = selectedTrack && subtitlesEnabled ? 'showing' : 'hidden';
      
      // トラック変更後に再度読み込み
      video.textTracks[0].mode = 'hidden';
      if (selectedTrack) {
        video.textTracks[0].mode = subtitlesEnabled ? 'showing' : 'hidden';
      }
    }
  
    function toggleSubtitleMenu() {
      document.getElementById('subtitleToggle').checked ^= true;
      toggleSubtitles();
    }
  
    // イベントリスナー
    videoSelect.addEventListener('change', handleVideoChange);
  
    ['input', 'change', 'mouseup'].forEach(eventName => {
      speedRange.addEventListener(eventName, () => updatePlaybackRate(speedRange.value));
      volumeRange.addEventListener(eventName, () => updateVolume(volumeRange.value));
      subtitleSize.addEventListener(eventName, () => updateSubtitleSize(subtitleSize.value));
    });
  
    speedInput.addEventListener('input', () => updatePlaybackRate(speedInput.value));
    volumeInput.addEventListener('input', () => updateVolume(volumeInput.value));
    subtitleSizeInput.addEventListener('input', () => updateSubtitleSize(subtitleSizeInput.value));
  
    loopCheckbox.addEventListener('change', () => {
      video.loop = loopCheckbox.checked;
    });
  
    audioOnlyCheckbox.addEventListener('change', toggleAudioOnlyMode);
    audioOnlyBtn.addEventListener('click', toggleAudioOnlyMode);
  
    subtitleToggle.addEventListener('change', toggleSubtitles);
    subtitleTrack.addEventListener('change', changeSubtitleTrack);
    subtitleBtn.addEventListener('click', toggleSubtitleMenu);
  
    playPauseBtn.addEventListener('click', togglePlayPause);
    video.addEventListener('click', togglePlayPause);
    video.addEventListener('play', () => playPauseBtn.textContent = '⏸');
    video.addEventListener('pause', () => playPauseBtn.textContent = '▶');
    video.addEventListener('timeupdate', updateProgress);
    progressContainer.addEventListener('click', setProgress);
    progressContainer.addEventListener('mousedown', () => isDragging = true);
    document.addEventListener('mouseup', () => isDragging = false);
    progressContainer.addEventListener('mousemove', (e) => isDragging && setProgress(e));
    volumeBtn.addEventListener('click', toggleMute);
    volumeSlider.addEventListener('input', handleVolumeChange);
    fullscreenBtn.addEventListener('click', goFullscreen);
  
    // 全画面変更イベントを監視
    document.addEventListener('fullscreenchange', updateSubtitleScaleForFullscreen);
    document.addEventListener('webkitfullscreenchange', updateSubtitleScaleForFullscreen);
    document.addEventListener('mozfullscreenchange', updateSubtitleScaleForFullscreen);
    document.addEventListener('MSFullscreenChange', updateSubtitleScaleForFullscreen);
  
    video.addEventListener('loadedmetadata', () => {
      updatePlaybackRate(speedRange.value);
      updateVolume(volumeRange.value);
      updateSubtitleSize(subtitleSize.value);
      video.loop = loopCheckbox.checked;
      toggleSubtitles();
      updateProgress();
      // 通常時の動画幅を記録
      normalVideoWidth = videoContainer.clientWidth;
    });
  
    // CSS変数を設定
    document.documentElement.style.setProperty('--subtitle-scale', '1');
    document.documentElement.style.setProperty('--subtitle-border-radius', '10px');
    document.documentElement.style.setProperty('--fullscreen-scale', '1');
    
    // 初期設定
    setupHoverTime();
    setupFullscreenContextMenu();
  </script>
</body>

</html>